MESON Chess Problem Database

Problem Display
PID: 242113 (6BB/6NQ/8/rpp3p1/r3P2P/2PkpR2/2R5/b2K4 w - - 0 1)

Shire, David J

StrateGems, 2020

6BB/6NQ/8/rpp3p1/r3P2P/2PkpR2/2R5/b2K4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.e5#
    • 1...Ra3
      • 2.e5#
    • 1...b4
      • 2.e5#
    • 1...c4
      • 2.e5#
  • Tries
    • 1.Sh5?
      • threat
        • 2.Rd2#
      • 1...Bxc3
        • 2.Rxc3#
      • 1...Ra2
        • 2.e5#
      • 1...Rd4!
    • 1.Se6?
      • threat
        • 2.Sxc5#
      • 1...Kc4
        • 2.Sf4#
      • 1...Rc4
        • 2.Rd2#
      • 1...c4
        • 2.Sc5#
        • 2.Rd2#
        • 2.e5#
      • 1...b4!
    • 1.Se8?
      • threat
        • 2.Rd2#
      • 1...Bxc3
        • 2.Rxc3#
      • 1...Ra2
        • 2.e5#
      • 1...Rd4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rxe3#
      • 1...Kxe4
        • 2.Sd4#
      • 1...Rxe4
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD::QAB(H)+P(E)
    • P(f);S_CUTR(d)::QAB(H)+P(E)
    • P(g);S_CUTR(d)::QAB(H)+P(E)
  • Tries
    • Try
      • S(G);
      • Threat
        • R1(B)
      • Vars
        • B(a);OGATE,XP(C)::R1(B),XB(a)
        • R(d);N_GUARD::QAB(H)+P(E)
      • Refutation
        • R(d);
    • Try
      • S(G);
      • Threat
        • S(G),XP(g)
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::B(I)+S(G)
        • R(d);SBLOCK::R1(B)
      • Refutation
        • P(f);
    • Try
      • S(G);
      • Threat
        • R1(B)
      • Vars
        • B(a);OGATE,XP(C)::R1(B),XB(a)
        • R(d);N_GUARD::QAB(H)+P(E)
      • Refutation
        • R(d);
  • Actual
    • S(G);
    • Threat
      • R1(D),XP(c)
    • Vars
      • K(b);N_SPINP(c),S_FLIGHT,XP(E)::QAB(H)+S(G)
      • R(d);SBLOCK,XP(E)::R1(B)
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